Steam-generator.



PATENTED MAR. 31, 1908.

G. W. JESSUP, JR. STEAM GENERATOR.

APPLICATION FILED APR.29, 1905.

4 SHEETS-SHEET v1.

70M Ki it OOOOG oooooooo- 000/3 0 fvi www- No. 883,407. PATENTED MAR.31, 1908. G. W; JESSUP, JR. STEAM GENERATOR. APPLEWATION EILBD APILZQ,1905.

4 SHEETSSHEET 2.

6 INYE TUB Jpmggirm W.

,4 fro/inf WI 77/5 885 S PATENTED MAR. 31, 1908.

G. w. JESSUP, JR. STEAM GENERATOR. APPLICATION FILED APR.29,1905.

4 SHEETS-SHEET 4.

GEORGE W. JESSUP, 1a., or WALTHAM, MASSACHUSETTS.

STEAM-GENERATOR.

Specification of Letters Patent.

Patented March '31, 1908.

' Application filed April 29, 1905. Serial No. 257,985.

To all whom it may concern:

Be it known that I, GEORGE W. JEssUP, J r. .a citizen of the UnitedStates, residing at Waltham, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improyements inSteam- Generators, of which the following is a specification. v

This invention relates to that class of steam generators whereintheproducts of, combustion from the fire pass through the water from whichthe steam is to be generated, my object being to-provide, in thisconnection, a simple and efliclent construction and organization ofparts whereby a large percentage of heat units contained in a ivenquantity of fuel is caused to effect i6 generation of steam.

Having this object in view the invention consists 1n the novelconstruction and combinations of parts which will be hereinafter 'fullydescribed and claimed.

In the drawings :Figure 1 is a sectional elevation of my im roved steamgenerator. Fig. 2 is a sectiona lan thereof, as on the line 22 of Fig.1.i

I Fig. 4 is a sectional detail, as on the line 4-4 of Fig. 2-. Fi 5 is asectional detail, as on the line 5-5 of ig. 4. Fig. 6 is a detail of.the lowerend of Fig. 4, as seen at ri ht angles thereto. Fig. 7 is asectional deta' of one of the burners. Fig. 8 is a vertical section, ason the line 88 of Fig. .1. Fig. 9 is a section plan of a portion of theautomatic regulating mechanism'for the burners, as on the line 99 ofFig. 1. Fig. 10 .is a sectional detail thereof, as on the line 10-10 ofFig. 9. Fig.

i 11 is a similar detail, ason the line 1l11 of Fig. 10. Fig; 12 is asimilar detail, as on the line 12-12 of Fi 1 1. g a

14 designates t e boiler which, in the present embodiment of myinvention, is cylindrical in form and vertically-arranged, as' shown.

Arranged centrally within the lower portion of the boiler 14 is thecombustion chamber 15 provided with o ening 15 in the bottom thereof toaffor communication between the combustion chamber and the boiler.Surrounding the combustion chamber 15 is acasing roviding .an annularchamber 16 between t e vertical walls of the casing, and betweenproviding also an annular space 17 t 3 is a sectional plan, .as on theline 3 3 of ig. 1.

e combustion chamber 15 and the chamber 16. The upper end of thecombustion chamber communicates with the up or end of the chamber 16 bya series of radiallyarranged pipes 18 through-which the products ofcombustion ass from the combustion chamber 15 into t e annular chamber16. The top of the chamber 16 is closed, exce ing as to the pipes 18,and the bottom of lihe chamber 16 is turned inwardly beneath the annularspace 17 as shown. The u per well of the inwardly turned portion of t echamber 16 is rovided with perforations 19 through which the products ofcombustion may escapefrom the chamber and be directed to ass up throughthe annular space 17.

ecured to the bottom of the boiler 14 is a large pipe or drum 20 whichopens into the lower portion of the combustion chamber 15' and extendsdown below the bottom of the boiler, the lower end of the pi e or drum20 being closed by a suitable ead 21. Arranged at or nearthe upper openend of the pipe 20 is a pair of burners 22. Leading to the burners 22and extending up through the head 21 and pipe 20 are air supply pipes 23which are connected by a common p1 e 24 to a larger pipe 25. This'pipe25 opens into the pi e or drum 20 and is connectedto a suitabge sourceof air supply, whereby air, under pressure, may be introduced to theburners 22 and pipe 24, suitable valves 26 and being provided wherebythe admission of air to the burners 22 and pi e 20, respectively,

the combustion chamber 15, above the urners 22, for a urpose hereinafterexplained.

Enterin t e air pipes 23 are the'oil supply pipes 29, ereinafterreferred to, which extend up through the air ipipes 23 to the burners 22and through Whic oil may be supplied to the burners under pressure.

Each burner 22, in the present instance, is of the followingconstruct1on:-Screwed onto the top of the oil pipe 29 is a head 60provided with a circular series of openings or channels 31 for thedischarge'of Oll from the pipe 29. Surrounding the head and screwed ontothe air 1pipe 23 is a cap 32 between which and the ead 30 spaces areprovided for the ,passage of the air. The top of the cap 32 is rovidedwith a-central opemng and it exten s over the oil channels 31 but out ofcontact with the head 30. Extending upwardly from the cap 32 is aperforated cup-like chamber 33 open at its upper end and screwed ontothe ca 32. The oil from the pipes 29 'is mixed with the air from thepipes 23 and vaporized upon being discharged from the to of the caps 32to the burners 22. The 0 supply pipes 29 lead from a valve 34 to theburners 22, and leadi to the valve 34 from a suitable source of oifsupply, is a ipe 35, whereb oil may be introduced to flhe burners uner pressure. The valve 34 comprises acasing 36 and a tapering plug 37fitted thereto. The pipe opens into a passageway 38 leading to the p ug37, and the pipes 29 open into passageways 39 and 40 also leading to theplug 37. The plug 37 is provided with a transverse opening 41 extendingtherethrough which is adapted to afford communication between the pi es35 and 23. The passageways 38, 39 an 40 are so proportioned and disposedrelatively to each other that by turning the lug 37 in one direction,communication may be established between the passageway 38 and bothpassageways .39 and 40, and by turning the-plug 37 in the reversedirection communication between-the passageway 38' and passageways 39and 40 may be cut off, one in advance of the other. The valve casin 36is made integral with or secured to a cy inder 42 provided with endheads 43 and 44- Fitted to this cylinder 42 is a piston 45 having a rod46 extending into an o ening 47 in a sleeve 48 which is externa yscrewthreaded and is screwed into the end head 44'. Encircling the rod46 and bearing against the iston 45 and a flange on the inner end 0 thesleeve 48 is a, spring 49 which tends normall toforcethe piston 45toward the end hea 43. On the outer end of the sleeve 48 is a-squarehead 50 by means of which the sleeve may be turned and thereby adjustedto re ulate the pressure of the spring 49. The s eeve is provided with asuitable lock nut 51 adapted to take against the end head 44 to lock thesleeve in its position of adjustment. Screwed into the end head 43' is apipe 52 having one of its ends opening into the boiler 15 and its otherend opening into the cylinder 42 whereby the boiler pressure may enterthe cylinder 42 to act uponand move the iston 45 in opposition to thespring 49. T e cylinder 42 is cut away, as at 53, adjacent to the bod ofthe piston 45, and the piston 45 is provi ed with a circumferentialgroove 54 within the cut away portion 53 of the cylinder. Enterin thisgroove 54 is a depending pin 55 carrie by an arm 56 which projects fromthe up er end of the valve plug 37, to the .end t at when the piston ismoved back and forth, the plug 37 Wlll be turned to open and close thevalve 34.

By the construction just described, it will be seen that the steampressure of the boiler and consequently mcreases or decreases the heatdelivered from the burners 22; that is to say, when the pressure of theboiler increases, the piston 45 will be forced thereby against theaction of the spring 49 in a manner to turn the plu 37 to reduce theamount of oil passing to t 'e burners,-the oil being entirely out ofifrom one burner in advance of the other as previously ex lained; and,when the pressure of the bo' er decreases, the piston will be forced bythe spring 49 against the boiler pressure to gradually 0 en the valve 34and increase the quantity 0 oil being delivered to the burners.Therefore, a uniform steam pressure may be maintained within the boiler14 by the automatic opening and closing of. the valve 34 under theinfluence of the boiler pressure.- By adjusting the sleeve 48 toincrease or decrease the pres-- sure of the s ring 49 against the piston45, any degree 0 steam pressure may be automatically maintained withinthe boiler. As a suitable means whereby a flame may be introduced to thecombustion chamber 15 to light the burners 22, I provide the following;Secured to the bottom of the boiler 14 is a member 57 to which isfastened the flanged collar 58 of a cylindrical guard 59 which extendsthrough the bottom of the boiler and bottom of the combustion chamber 15to a point adjacent to the burners 22. Screwed into the collar 58 is auni0n'60 carrying a valve body 61 having an opening 62 extendingtherethrough in line with the union 60 and guard 59. Fitted to the valvebody 61 is a tapering plug 63 having a transverse opening 64 therein,which opening is adapted to register with the opening62, as shown, andform, in effect, a continuation thereof. When the lug 63 is turned to aposition at right ang esto that shown, the lug will close the opening62. Projecting irom'the plug 63 is a suitable-handle 65 by means ofwhich it may be turned. Formed on the bottom of the valve body 61 is achamber 66 communicating with the opening 62 and provided with a lateralopening 67 therein. fitted thereto is a ta ering collar 68 having alateral opening :69. t erein which, when the collar is turned is adaptedto register with the opening 67 whereby access may be had to the chamber66. The collar 68 is provided with asuitable handle 70 as 'a meanswhereby it may be turned. Screwed into the lower end of the chamber 66is a head 71 having a stufling box 12 through which extends an oil tube73, the lower end of which is connected to a suitable source of oilsupply whereby oil, under pressure, may be supplied to the tube. Thistube 73 extends centrally through the chamber 66, the o ening 62 and 64,the union 60 and the guar 59 to a point adjacent to the burners 22, andthe upper end Surrounding the chamber 66 and closely of the tube 73carries a burner of asbestos 74 or similar material to receive the oilfrom the tube 73. When it is desired to light the burners 22, the tube73 is drawn outwardly through the head 71 until the asbestos 74 oocupiesa position within the chambers 66. The valve plug 63 is then turned toclose the opening 62 to cut off communication between the interior ofthe boiler and the open air, and the collar 68 turned to bring theopening 69 into register with the openin 67 to afford access to theburner 74 whic is then lighted. This being done, the collar 68 is turnedto close the opening 69, the plug 63 is turned to bring the opening 64into register with the 0 ening 62 and the tube is moved back to t eposition shown to cause the flame carried by the burner 7 4 to ignitethe mixture of oil and air delivered to the burners 22.

In order to force the tube 73 back into the combustion chamber againstthe pressure therein, I rovide a cord 74 one end of which is fastene tothe outer end of the tube 73 and the other end of which is fastened toand wound around a suitable reel 75 journaled in the head 71 andprovided with asuitable handle 76.

I claim 1. In a steam generator, a boiler, a combustion chamber therein,provided with openings in its lower portion to afford commu nicationbetween said chamber and boiler, a burner within the combustion chamberand located above said openings, a fuel supply pipe leading to theburner and an air pipe communicating with the combustion chamber awayfrom the burner.

2. In a steam generator, a boiler, a combustion chamber within theboiler, a second chamber within the boiler and communieating with theupper portion of the combustion chamber said chamber having its.

lower portion provided with openings communicating with the boiler, aburner within the combustion chamber, and a fuel supply pipe leading tothe burner.

3. In a steam generator, a boiler, a combustion chamber within theboiler and having its lower portion opening into the boiler, a secondchamber within the boiler and communicating with the upper portion ofthe combustion chamber said chamber having its lower portion providedwith openings communicating with the boiler, a burner within thecombustion chamber, and a fuel supply pipe leading to the burner.

4C. In a steam generator, a boiler, a combustion chamber therein, asecond chamber within the boiler and surrounding the combustion chamber,said second chamber having its upper portion communicating with theupper portion of the combustion chamber and its lower portioncommunicating with the boiler, a burner within the combustion chamber,and a fuel supply pipe leading to the burner.

5. In a steam generator, a boiler, a combustion chamber provided withopenings in its lower portion to afford communication between saidchamber and boiler therein and communicating therewith, a burner withinthe combustion chamber, and located above said openings, a fuel supplpipe leading to the burner, and means un er the control of the boilerpressure for automatically regulating the supply of fuel to the burner.

,6. n a steam generator, a boiler, a combustion chamber therein andcommunicating therewith, a air of burners within the combustion chamber,fuel supply pipes leading to the burners, and means under the control ofthe boiler pressure for automatically regulating the supply of fuel tosaid burners one in advance of the other.

7. In a steam generator, a boiler, a combustion chamber therein andcommunicating therewith a burner within the combustion chamber, a fuelsupply pipe leading to said burner, a second burner movable into and outof the combustion chamber to light the first named burner, and meanswhereby access may be had to said second burner without disturbingtheboiler ressure.

-8. In a steam generator, a oiler, a combustion chamber therein andcommunicating therewith, a burner within the combustion chamber, a fuelsupply pipe leading to said burner, a second burner movable into and outof the combustion chamber to light the first named burner, means wherebyaccess may be had to said second burner without disturbin the boilerressure, and means under t e control of t e boiler pressure forautomatically regulating the supply of fuel to the first named burner.

9. In a steam generator, a boiler, a combustion chamber provided withopenings to afford communication between said chamber and boiler thereinand communicating therewith, a burner within the combustion chamher andlocated above said openings, an oil pipe leading to the burner, an airipe leadmg to the burner, and an air pipe eading to the combustionchamber. 6

10. In a steam generator, a boiler, a com bustion chamber therein and.communicating therewith, a burner within the combustion chamber, a fuelsupply pipe leading to the burner, and an air pi 'e' leading to thecombustion chamber an provided with branch passa eways opening into thecombustion cham er above the burner therein.

In testimony whereof I afiix my signature in presence of two witnesses.

ERNEST R. WATERMAN, BREWSTER C. SHETTER.

